Narcissism cannot be reduced to specific genes or to pinpointed neural pathways or activities. Narcissistic Personality Disorder (NPD) is all-pervasive: narcissism IS the narcissist.
Categorical criteria phased out in favor of dimensional alternative model. Additionally, we are transitioning from a static to a dynamics model (no type constancy) and from an ego-syntomic to an ego-dystonic (compensatory) model.
Heritability not gene specificity.
Hereditary contribution in BPD, AsPD (psychopathy).
LITERATURE
DiLalla, L.F., Diaz, E., Jamnik, M.R. (2020). Toward the Dark Side: Temperament, Personality, and Genetics Related to Antisocial Behaviors. In: Saudino, K.J., Ganiban, J.M. (eds) Behavior Genetics of Temperament and Personality. Advances in Behavior Genetics. Springer, New York, NY. https://doi.org/10.1007/978-1-0716-0933-0_7
Cascio CN, Konrath SH, Falk EB. Narcissists' social pain seen only in the brain. Soc Cogn Affect Neurosci. 2015 Mar;10(3):335-41. doi: 10.1093/scan/nsu072. Epub 2014 May 23. PMID: 24860084; PMCID: PMC4350489.
Benedek M, Jauk E, Beaty RE, Fink A, Koschutnig K, Neubauer AC. Brain mechanisms associated with internally directed attention and self-generated thought. Sci Rep. 2016 Mar 10;6:22959. doi: 10.1038/srep22959. PMID: 26960259; PMCID: PMC4785374.
Borráz-León JI, Spreitzer A, Scrivner C, Landers M, Lee R, Maestripieri D. Cortisol reactivity to psychosocial stress in vulnerable and grandiose narcissists: An exploratory study. Front Psychol. 2023 Jan 6;13:1067456. doi: 10.3389/fpsyg.2022.1067456. PMID: 36687967; PMCID: PMC9852882.
Czarna, A.Z., Wróbel, M., Folger, L.F., Holtzman, N.S., Raley, J.R., & Foster, J.D. (in press). Narcissism and Narcissistic Personality Disorder: Evolutionary roots and emotional profiles. In T.K. Shackelford & L. Al-Shawaf (Eds.), The Oxford Handbook of Evolution and the Emotions. Oxford University Press.
Liveslye, W.J., Jank, K.L., Jackson, B.N., Vernon, P.A.. 1993. Genetic and environmental contributions to dimensions of personality disorders. Am. J. Psychiatry. 150(O12):1826-31.
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